Effect of reaction temperature and flow rate of precursor on formation of multi-walled carbon nanotubes
The effect of reaction temperature and flow rate of precursor on the quantity and quality of the multi-walled carbon nanotubes (MWNTs) produced by catalytic chemical vapour deposition (CCVD) was studied. The MWNTs were grown over molecular sieve supported catalyst at 700 and 850 °C with flow rate o...
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| Language: | English |
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Penerbit UTM Press
2008
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| Online Access: | http://eprints.utm.my/8661/ http://eprints.utm.my/8661/3/AhmadFauziIsmail2008_EffectofReactionTemperatureandFlow.pdf |
| _version_ | 1848891735928733696 |
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| author | Tee, Jia Chee Aziz, Madzlan Ismail, Ahmad Fauzi |
| author_facet | Tee, Jia Chee Aziz, Madzlan Ismail, Ahmad Fauzi |
| author_sort | Tee, Jia Chee |
| building | UTeM Institutional Repository |
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| description | The effect of reaction temperature and flow rate of precursor on the quantity and quality of the multi-walled carbon nanotubes (MWNTs) produced by catalytic chemical vapour deposition (CCVD) was studied. The MWNTs were grown over molecular sieve supported catalyst at 700 and 850 °C with flow rate of acetylene at 15 and 30 sccm. The effect of an in-situ heat treatment on the as-grown MWNTs at 200 °C was investigated. Thermogravimetric analysis (TGA) results show that CNT purity decreases with increasing reaction temperature, from 63.31 wt% at 700 °C to 61.68 wt% at 850 °C. However, the increase of acetylene flow rate from 15 sccm to 30 sccm has improved the yield of MWNT from 63.31 wt% to 69.28 wt%. The MWNTs grown at 850 °C with 30 sccm of acetylene show 68.23 wt% of purity, attributed to the higher acetylene flow rate. Acetylene flow rate of 30sccm produced higher purity of MWNTs whereas reaction temperature of 700 °C is more effective in generating MWNTs. The in-situ heat treatment at 200 °C gave the highest purity of MWNTs at 87.52 wt%. TEM and HRTEM images suggest that the impurities on the wall layers of MWNT yield were burn off at 200 °C. The in-situ heat treatment is able to reduce the impurities and hence yielded higher purity MWNTs. |
| first_indexed | 2025-11-15T21:02:42Z |
| format | Article |
| id | utm-8661 |
| institution | Universiti Teknologi Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T21:02:42Z |
| publishDate | 2008 |
| publisher | Penerbit UTM Press |
| recordtype | eprints |
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| spelling | utm-86612014-08-10T03:16:01Z http://eprints.utm.my/8661/ Effect of reaction temperature and flow rate of precursor on formation of multi-walled carbon nanotubes Tee, Jia Chee Aziz, Madzlan Ismail, Ahmad Fauzi TP Chemical technology The effect of reaction temperature and flow rate of precursor on the quantity and quality of the multi-walled carbon nanotubes (MWNTs) produced by catalytic chemical vapour deposition (CCVD) was studied. The MWNTs were grown over molecular sieve supported catalyst at 700 and 850 °C with flow rate of acetylene at 15 and 30 sccm. The effect of an in-situ heat treatment on the as-grown MWNTs at 200 °C was investigated. Thermogravimetric analysis (TGA) results show that CNT purity decreases with increasing reaction temperature, from 63.31 wt% at 700 °C to 61.68 wt% at 850 °C. However, the increase of acetylene flow rate from 15 sccm to 30 sccm has improved the yield of MWNT from 63.31 wt% to 69.28 wt%. The MWNTs grown at 850 °C with 30 sccm of acetylene show 68.23 wt% of purity, attributed to the higher acetylene flow rate. Acetylene flow rate of 30sccm produced higher purity of MWNTs whereas reaction temperature of 700 °C is more effective in generating MWNTs. The in-situ heat treatment at 200 °C gave the highest purity of MWNTs at 87.52 wt%. TEM and HRTEM images suggest that the impurities on the wall layers of MWNT yield were burn off at 200 °C. The in-situ heat treatment is able to reduce the impurities and hence yielded higher purity MWNTs. Penerbit UTM Press 2008-12 Article PeerReviewed application/pdf en http://eprints.utm.my/8661/3/AhmadFauziIsmail2008_EffectofReactionTemperatureandFlow.pdf Tee, Jia Chee and Aziz, Madzlan and Ismail, Ahmad Fauzi (2008) Effect of reaction temperature and flow rate of precursor on formation of multi-walled carbon nanotubes. Jurnal Teknologi, 49F . pp. 141-147. ISSN 0127-9696 |
| spellingShingle | TP Chemical technology Tee, Jia Chee Aziz, Madzlan Ismail, Ahmad Fauzi Effect of reaction temperature and flow rate of precursor on formation of multi-walled carbon nanotubes |
| title | Effect of reaction temperature and flow rate of precursor on formation of multi-walled carbon nanotubes
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| title_full | Effect of reaction temperature and flow rate of precursor on formation of multi-walled carbon nanotubes
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| title_fullStr | Effect of reaction temperature and flow rate of precursor on formation of multi-walled carbon nanotubes
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| title_full_unstemmed | Effect of reaction temperature and flow rate of precursor on formation of multi-walled carbon nanotubes
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| title_short | Effect of reaction temperature and flow rate of precursor on formation of multi-walled carbon nanotubes
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| title_sort | effect of reaction temperature and flow rate of precursor on formation of multi-walled carbon nanotubes |
| topic | TP Chemical technology |
| url | http://eprints.utm.my/8661/ http://eprints.utm.my/8661/3/AhmadFauziIsmail2008_EffectofReactionTemperatureandFlow.pdf |